Global Drought Monitoring: Agricultural Stress Index (ASI)

បោះពុម្ពផ្សាយដោយ៖ Open Development Mekong

The Index is based on the integration of the Vegetation Health Index (VHI) in two dimensions that are critical in the assessment of a drought event in agriculture: temporal and spatial. The first step of the ASI calculation is a temporal averaging of the VHI, assessing the intensity and duration of dry periods occurring during the crop cycle at the pixel level; this calculation includes the use of crop coefficients, which introduces sensitivity of a crop to water stress during each phenological phase. The second step determines the spatial extent of drought events by calculating the percentage of pixels in arable areas with a VHI value below 35 percent (this value was identified as a critical threshold in assessing the extent of drought in previous research by Kogan, 1995). Each administrative area is classified according to the percentage of the affected area to facilitate the quick interpretation of results.

Important note: Map legend value= Pixel physical value * multiplier (0.5)

ធនធានទិន្នន័យ (2)

មើល​ធនធានទិន្នន័យ - Explore this and other data in the Geospatial Data Explorer (TerriaJS)

Additional Info

Field Value
ចំណាត់ថ្នាក់ប្រធានបទនៃសំណុំទិន្នន័យ
  • ផលិតផលដំណាំ និងទំនិញ
  • គ្រោះរាំងស្ងួត
  • គោលដៅទី១៣ សកម្មភាពបរិស្ថាន
ភាសា
  • ភាសា​អង់គ្លេស
កាលបរិច្ឆេទយោងនៃសំណុំទិន្នន័យ មករា 1, 2020
ចន្លោះកាលបរិច្ឆេទបញ្ចប់ មករា 1, 2000
ចន្លោះកាលបរិច្ឆេទបញ្ចប់ មករា 1, 2020
ឈ្មោះភូមិសាស្ត្រ
  • សកលលោក
ភាពទៀងទាត់ There is no information about positional accuracy.
ភាពទៀងទាត់ There is no attribute accuracy known.
ភាពទៀងទាត់តាមហេតុផល There is no logical consistency known.
ការចប់សព្វគ្រប់ The data is completed.
Lineage Global Information and Early Warning System on Food and Agriculture (http://www.fao.org/giews/earthobservation/index.jsp?lang=en)
ការដាក់កំហិតលើការចូលប្រើជាសាធារណៈ http://www.fao.org/contact-us/terms/en/
អាជ្ញាប័ណ្ណ

No license given

សិទ្ធិ Yes
ពាក្យគន្លឹះ vegetation drought
កាលបរិច្ឆេទផ្ទុកឡើង វិច្ឆិកា 12, 2020, 19:23 (UTC)
កាលបរិច្ឆេទកែប្រែ វិច្ឆិកា 16, 2020, 09:23 (UTC)